[andi1571]

i have seen this happen too when benching this ecu on pcm flash seem this ecu was unstable at times flash is comprehensive too with virtual eprom in there encrypted fsb4 making it even harder to recover once its messed up.

Solution for us was new ecu reprogrammed on xentry dont forget injectors have to be coded too and are a bitch to get to £700 gbp for new ecu @ mercedes dealer parts!

So you had to purchase new ECU, could not re use original and re program again?

Afraid not in my case but you could always try xentry for a recovery